FactoryTest.java

package JavaPatternDemos;


/**
 * 抽象工厂方法
 *
 * 不同的工厂生成不同系列的产品
 */
public class FactoryTest {
 public static void main(String[] args) {
 BaseFactory dalian = new DalianFactory();
 BaseFactory beijing = new BeijingFactory();

 Eatable dalianEating = dalian.createEat();
 Drinkable dalianDrinking = dalian.createDrink();

 Eatable beijingEating = beijing.createEat();

 dalianEating.eat();
 beijingEating.eat();

 dalianDrinking.drink();
 }
}


interface Eatable{
 void eat();
}

class Apple implements Eatable{
 @Override
 public void eat() {
 System.out.println("eat apple");
 }
}

class Banana implements Eatable{
 @Override
 public void eat() {
 System.out.println("eat Banana");
 }
}

interface Drinkable {
 void drink();
}

class Cola implements Drinkable{

 @Override
 public void drink() {
 System.out.println("Drink cola");
 }
}

abstract class BaseFactory {
 public abstract Eatable createEat();
 public abstract Drinkable createDrink();
}


/**
 * 大连工厂产苹果
 */
class DalianFactory extends BaseFactory {
 @Override
 public Eatable createEat() {
 return new Apple();
 }
 @Override
 public Drinkable createDrink() {
 return new Cola();
 }
}


/**
 * 北京工厂生产香蕉
 */
class BeijingFactory extends BaseFactory {

 @Override
 public Eatable createEat() {
 return new Banana();
 }

 @Override
 public Drinkable createDrink() {
 return new Cola();
 }
}